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Contaminated Brownfield Sites

: I accept the hon. Gentleman's point. If benzo(a)pyrene is widespread, as seems to be the case, and if its presence in low levels in gardens at different depths is not likely to present any risk to people, we should take great care that we do not blight large areas of the country. That would not be in any of our interests and it is certainly not the Government's intention to do that. The hon. Gentleman returns to the point about an appropriate level. All I can do is repeat the point that I made. There will be different risks in relation to different levels. That is why it will be difficult to have an absolute number and say that one point below that things are okay and one point above it they are not. I am speculating in advance of the report, but there may well be a band relating to where greater care has to be taken. The SGVs give some indication—